What Car? Q&A - Introduction

Are there green 4x4s? Should a speeding ticket be appealed and should you 'park' an automatic while waiting at traffic lights?

These are all real questions from readers like you. Each week we answer a selection of readers' queries. To find out our advice on the latest questions and more, read on.

If you want to submit a question of your own, see below for details.

Tried our advice section?Before you send in an e-mail, you could find the answer you're looking for in our advice section and glossary. Click here to go to our advice section, and here to take a look at the glossary.